Eudolph  schmidt



R. SGHMIDTQ STEAM PUMP.

Patented Aug. 6, 1867.

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RUDOLPH SCHMIDT, OF NEW YORK, N. Y;

I Letters Patent No. 67,592, dated Alt- Q3816, 1867.

IMPROVEMENT IN STEAM-PUMPS.

TO ALL WHOM IT MAY CONCERN: 7

Be it known that I, RunoLrn SCHMIDT, of the city, county, and State ofNew York, have invented a new and improved Steam-Pump; and I do herebydeclare thatthe following is a full, clear, and exact descriptionthereoflwhich will enable others skilled in the art to make and use thesame, reference being had to the accompanying drawings, forming part ofthis specification. v I i This invention relates to the device by whicha pump for raising water is combinedwith and operated by a sie 1mengine; 'and it consists in the arrangement oi pistons of 'diiierentsizes upon the rodsliding in the steamchest, the vertical rod providedwith collars and operated from piston of the cylinder, wherebythe portsfor the admission and exhaust of steam are opened and closed; and in thearrangement of the stufiing-box, whereby the cylinders are separated. I

Figure 1 represents a vertical section-of the steam-pump through theline a: not fig. 2.

Figure 2 is a horizontal section of fig. '1, through the line y 3 Figure3 is a vertical section of fig. 2, through the line-z 2.

Similar letters of reference indicate likeparts. I

A represents, the steam-cylinder; B'the water or pump-cylinder. C is thesteam-piston, andD the-pumpplunger. E is the piston and plunger-rod. Fis the stufiing-box around the plungerl). a a are watervalves whichregulate the admission and discharg'e'of he water. The piston C isdriven in ,the ordinary way, by taking steam in the ends of the cylinderalternately, and the piston-rod being attached to the plunger, it willbe seen that the plunger has the same stroke as the piston. When theplunger is driven down the valve a will rise for the water to passthrough, and when the plunger is drawn up thevalve a will rise for thewater to enter. The stufling-box F is screwed into the chamber aroundthe plunger, as seen in the drawing, and it will be noticed that thereare two small holes or recesses in the top of it. On the bottom of thepiston (lthere are two pins, which will fit into-the holes when thepiston is down, thus-locking the smiling-b0); and piston together. 0nthe bottom of the plunger there is a square at c. The bottom of theplunger-cylinder, marked d,.is mova ble, so that by taking it oil akey-wrench may be put upon the square 0, by which the plunger and pistonmay be turned round, and in this way the stalling-box is screwed downwhen it requires tightening. Thesame thing can be done by turning thepiston-rod. The stufiing-box can be taken out or put in place at anytime by taking oil the cylinder-head and removing the rod with thepiston and plunger. The device by which the steam is admitted to andexhausted from the steam-cylinder is peculiar in its construction, asseen in figs. 2 and 3. As seen in fig. 1, steamis entering the bottom ofthe cylinder under the piston, through an aperture made through the headand the shell of the cylinder, which is seen in dotted lines, and isindicated by the arrow: From the top of the cylinder the steam isexhausting through the cylinder-head, as indicated by the arrow. Thesteamchest is marked G, and it is attached directly to the cylinder-headof the engine. It is cylindrical in shape, and without valves, but witha'rod which has three pistons attached to it, which slide in the chest,covering and uncovering the steam-"ports or apertures so that the steamis admitted to and exhausted from-the cylinder, according to themovement of the pistons in the chest. These pistons are marked e e ande. It will be noticed that the diameter of the pistons e e is greaterthan that of e. These pistons, with the rod, are moved back and forth inthe chest by the pressure of the steam. h, fig. l, is a vertical rod,which has collars on its upper portion marked This rod is raised andlowered byafcrked arm, marked f, which is attached to the pistonrodmarked E, and moves up and down with it. It is attached to thepiston-rod by a ring marked J. On the lower end of the rod 11 there is apiston valve, m, which opens and closes an aperture, (seen in thedrawing,) which passes from the chamber n, in which the piston m moves,to the steam-chest G. This aperture is seen in dotted lines in fig. 2.This chamber n. is also connected with the end of the steam-chest, asseen in the same figure. When the piston-rod E rises, the red It israised, which allows the steam to exhaust from the upper end of thecylinder, by admitting steam into the end of the steam-chest behind theouter pistone, which drives the pistons to the other end of thesteam-chest thereby opening the exhaust-port la, from whence the steamescapes, as seen inthe drawing. The steam being admitted into thesteam-chest always between the middle pisto'ne and the small piston e,the piston-valves are'driven back, when the rod h descends, and thecommunication with the steam-chest and the chamber n is cut of and theexhaust-port opened. The difl'erence in the areas of the pistons e and aefi ots this, for were there no difference the pressure would bebalanced and thepistons would stand still. when they are thus thrownback the steam is exhaust-ed from the bottom end of the cylinder throughanother aperture seen in the drawing at o, the exhaust pipe beingattached at I am aware that the apertures for the admission anddischarge of water in water engines have been opened and closed bysliding pistonwalyes before, but I am not aware that such piston-val'yeshave heretofore been moved by the pressure of steam opc-ratingupon suchp'istons when the movement depended upon a difference in .the'areas ofsuch pistons. I am also. aware that the plunger may bepacke d by ringsor by other means equivalent to the smiling-box, but I deem thestu'fiing-box substantially as shown the best'method.

What I claim as new, and desire to secure by Letters Patent, is-

1. The arrangement of the pistons e e and small piston 0' upon the-rodsliding in the steam-chest G, the vertical 'rod 7;, with collars ii,operated from the piston D, substantially as herein shown and described,whereby the ports for the admission and exhaust of steam are opened andclosed as and for the purpose specified.

' 2. The arrangement of the shilling-box F, whereby the two cylindersare separated, substantially as shown and described.

R. SCHMIDT.

Witnesses:

WM. F. McNAMARA, ALEX. F. Ron nn rs.

